feat(backend): add GET /api/{remittances,providers,activity}

backend/tests/test_api_gets.py

@@ -125,3 +125,62 @@ def test_claims_pagination_limit_offset(seeded_store):
     body1 = resp1.json()
     assert body1["returned"] == 1
     assert body1["has_more"] is True
+
+
+# --------------------------------------------------------------------------- #
+# /api/remittances
+# --------------------------------------------------------------------------- #
+
+
+def test_remittances_returns_empty_list_when_no_parses(client: TestClient):
+    resp = client.get("/api/remittances")
+    assert resp.status_code == 200
+    body = resp.json()
+    assert body["items"] == []
+
+
+def test_remittances_filters_by_batch_id(seeded_store):
+    """No 835 fixture parsed yet — but the endpoint should return 200 with empty."""
+    resp = seeded_store.get("/api/remittances?batch_id=nope")
+    assert resp.status_code == 200
+    assert resp.json()["items"] == []
+
+
+# --------------------------------------------------------------------------- #
+# /api/providers
+# --------------------------------------------------------------------------- #
+
+
+def test_providers_empty_when_no_parses(client: TestClient):
+    resp = client.get("/api/providers")
+    assert resp.status_code == 200
+    body = resp.json()
+    assert body["items"] == []
+
+
+def test_providers_returns_one_per_distinct_npi(seeded_store):
+    resp = seeded_store.get("/api/providers")
+    assert resp.status_code == 200
+    body = resp.json()
+    assert len(body["items"]) == 1
+    assert body["items"][0]["npi"] == "1881068062"
+
+
+# --------------------------------------------------------------------------- #
+# /api/activity
+# --------------------------------------------------------------------------- #
+
+
+def test_activity_empty_when_no_parses(client: TestClient):
+    resp = client.get("/api/activity")
+    assert resp.status_code == 200
+    body = resp.json()
+    assert body["items"] == []
+
+
+def test_activity_returns_one_event_per_claim(seeded_store):
+    resp = seeded_store.get("/api/activity")
+    assert resp.status_code == 200
+    body = resp.json()
+    assert len(body["items"]) == 2  # co_medicaid_837p.txt has 2 claims
+    assert all(e["kind"] == "claim_submitted" for e in body["items"])